Sort out compact reversible representation of a location

[nealeu]

For simplicity of not storing information in multiple locations, we want to be able to take an input such as a postcode, and have it's ECEF vector available internally for scoring, and on retrieval, have the location as well.

We could accept a full postcode and country prefix (or some other string representation of location such as {53.33, 0.14} i.e. lat lon):

• we would store: {postcode:String, vector:EcefVector}
• on retrieval we would expand to:
  • Country, Region, Town
  • EcefVector (from which we can getLatDegs(), getLonDegs() )
• And the scorer would give the distance